zomg, a Metered Light PocketSpot Meter just appeared in the post...
...after what seems like around seven years of correspondence Thanks Eric & Karl!!
First impressions: small and indestructible, and (metering 'stuff' around the home this evening) it agrees with my Sekonic spot meter completely. This (along with one day investing in an f/9 300mm lens, and a carbon fibre tripod, etc) will make some of that difficult terrain photo-hunting a bit lighter/nicer! And it's very nicely designed for zone calculations too (which I really ought to do, since I use the same film and developer pretty much always).
I can hardly wait to take it out on adventures - so excited!